Searchlight



c." HxRscH SEARCHLIGHT Nov. 24,v 1931.

Filed Oct. 1o, 1930 www Patented Nov. 24, 1931 UNITED vSTATES PATENT OFFICE Y K CARL HIRSCI-I, OF LEIPZIG, GERMANY, ASSIGNOR T HUGO SCHNEIDER AKTIENGESELL- SCHAFT, OF LEIPZIG, GERMANY SEARCHLIGHT Application led October 10, 1930, Serial No. 487,777, and in Germany March 25, 1930.

This invention relates to an improvement ofthe searchlight acording to patent application Serial No. 465,628 filed July 3rd, 1930.

The searchlight of the above application is 5 constructed in such a manner that the transmission of the handle mov-ement, necessary for: moving the searchlight in horizontal plane, is eliected by a tube rigidly lixed in the casing of the oscillatable handle, which tube is rotatable in a supporting arm and carries on its front end of the driving wheel of a known pair of bevel wheels, the driven wheel of which is fastenedr on the lower pin of a universal joint-like searchlight bracket, whereas the transmission of the handle movement, necesary for moving the searchlight in vertical position, is effected by a pull rope or the like, fastened on the upper end of the two armed handle, which rope passes through the :w tube, runs over a guide roller mounted in the supporting arm head and engages on the upper joint part of the searchlight bracket.

Extensive practical experiments have shown that, when the searchlight is frequent- '25 ly used, the pull rope easily stretches, thus impairing the proper working of the searchlight, and for overcoming which it is necessary to dismantle same, so that in any case an interruption of service cannot be avoided.

These disadvantages are overcome according to the invention in that the two armed handle is connected by a slot and pin to a known connecting rod shiftable in the rotary tube,

which rod has on its end projecting over the .35. driving bevel wheel, teeth arranged obliquely to the axis of the rod which teeth engage in a similarly toothed lower end of a rack, arranged Vat right angles thereto, shiftable in the rotatable searchlight bracket. and engag- Q ing with the teeth at its upper end in a toothed wheel carrying the searchlight and rotatable in the searchlight bracket. In this manner an extremely simple positively connected chain of elements is formed between 45 the handle and the searchlight, which entirely prevents inaccurate working of the searchlight.

An embodiment of the invention is illustrated by way of example in the accompanying drawings in which:

Fig. 1 shows the searchlight in side elevation, partly in section,

Figs. 2 and 3 representing consti-notional details thereof.

Like the searchlight according tothe main application, that according to the present invention has as a bearing part a supporting arm 2, which is .fixed on the front wall 'of the car body and forms on its free end a hollow head 4. This head is closable at the front by a screw cover 33 and serves as bearing -for a rotar?,7 bracket 6, which supports the searchlight 37 by means of a toothed wheel 36, mounted in a. cut out portion. ot the bracket. The lower end of the bracket 6 has an extension 5 extending through the wall of the head 4, a bevel wheel 12 keyed on its lower end. This bevel wheel 12 meshes with a bevel wheel 13, keyed on the trent end oi a tube 14. treeiy rotatable in the supporting arm 2. The rear end of this tube 14 is rigidly lixed in a casing 15 which serves as bearing for a handle 18, 19 pivotable around a pin 17 and adapted to be turned therewith in a planeat right angles to the axis of the supporting arm.

he upper arm 19 of the two armed handle 18 grips with a slot 38 over a pin 39 ot a connecting rod 4() freely shiftable in the bore ot the tube 14. On its front end projecting over the driving bevel wheel 13 this connecting rod 40 is provided with oblique teeth, which are preferably arranged at an angle of to the axis of the connecting rod. The oblique teeth 41 engage in correspondingly arranged, that is also oblique teeth 42 of a rack 43 standing at right angles to the connecting rod 40 and shiftable in the searchlight bracket 6, which rack 43 like the connecting rod 40 is of round cross section and has on its upper end circular teeth 44, by means of which it meshes in the toothed wheel 36. If the handle 18L is for example pressed forward, the connecting rod 40 is pulled back and thereby cooperates by means of the flanks of its teeth 41 directed towards the right according to Fig. 2, with the lower flanks of the oblique teeth 42 in such a manner, that the rack 43 is raised, so that the toothed wheel 36 is rotated in counter clock- WiseY direction according to Fig. 1.

The in Which the connecting rod and the toothed searchlight 37, carried by the toothed Wheel rack are rotatable through 180 in their 36, is consequently tilted forwards,

in the case or" the handle 18 being oscillated in the opposite direction, the searchlight Will be moved in the opposite direction. By

turning Vthe. handle 18 at the Sametime in a plane at right angles to the axis of the supporting arin 2, the searchlight, Whilst being inoved 'in-the vertical plane, can also be adjusted in the horizontal plane. Y

The connecting rod 10 and the rack 48, as already mentioned, are of round Vcross section, this presenting the advantage that they can be very vsiinply inounted inl a bore of the tube 14; and of. the .brac-liet .6 respectively. The connectingrodand the racksare f both flattened at `their enns, providedwith oblique teeth, to one halt their cross section, the flattened portions facing and at the saine time guiding one aifiotherlv Thetransniission of nioveineiit takes place in a coinnion plane, eXteiidingeXactly through thel axisl of v.the connecting rod andthe rack. Y

K 'lfboth the'connectv-ingrcdi-,0 andthe rack' i; c 4K8 vareturned$1800 in their bearings,thewop 'pcsite inoveinent of the .searchlights will be effected vwith the saine direction f otinoveinent of the handle as before, thisbeing desirable in certain instances.,

1. A searchlightconiprising in ycombination with' the searchlight, a bracket. carrying said searclilight, a hollow arm supporting said bracket,.a tuberotatablein saidhollow .arin,a connecting'rod sliiftable in said tube, av pin on the end of said rod, a twol armed khandle having av Aslot engaging With said pin," a driving bevel Wheel at a; distance .troni the end of Vsaid rod, teeth on the end of' said rod, projecting beyondvr said bevel Wheel oblique to the axis. of said connecting rod,

a rack shiftable inv said searchlight bracketr arranged at right angles to said connecting rod, teethV on the end of said rack oblique to the aXis'of said rack adapted to niesh with the teeth on said connecting rod, a toothed portiony on the upper end of said rack, and a toothed Wheel carrying said searchlight, rotatably mounted in said braclfet adaptedto engage With the toothed portion of said rack. l

.2. A'searchlight as sp-ecilied in claim 1, in Which the conecting rod and the rack are of circularv cross Vvsection and flattened to halt their cross section at the end having inclined teeth, said flattenedY portions .facing and adapted te guide one another.

3. Asearchlight as specified inrclaini 1,

in Awhich the toothed portion'of the racl; co-

operating with theftoothed Wheel carrying fthe searchlight, is' provided -With'annular Whereas n bearings.

In testimony whereof I aHX' my signature.

CARL HIRSCH.

' Hit' ias 

